In my opinion, none. If you have to separate hops, like when you have a plate chiller, the best option is containment. Nothing you could install would have enough surface area.

Sorry not following? If going by the assumption that you want to leave the trub and the boiled hops in the boil kettle when transferring to primary. Maybe that's up for debate, but I'm going by what I've read in most recommendations. So I'd think a bazooka screen would at least keep the hops from going to primary. I'm using an immersion chiller so that's not a consideration. What do you mean by containment?

I use a hop spider in the boil keggle to keep the hop matter contained. This is due to using a plate chiller. IF I wasn't using a plate chiller, though, I'd probably just let it all go into the fermenter. It's been proven that the trub will do NO harm to the brew. There was a test done where they brewed enough to fill two fermenters. They were careful to not have the trub go into one of them, and let it go into the other. The one with the trub ended up being clearer in glass and tasted better.

BTW, if I'm only using a few ounces of hops, I'm more inclined to not use the spider. However, when I'm using 5oz, or more, of hops, I use the spider. Last two batches used 7.5oz (each) of hops, so the spider was fully leveraged.

Sounds like I may not have to worry about the trub going into primary after all. If its one less thing to worry about ill just leave te bottom of the boil kettle empty and open it up and let er rip at primary time.

You should be fine with just having a dip tube in the kettle. IF you go for larger batch sizes, like 1/2 bbl or over a full barrel, then you might want to do something else. Especially if you're using a plate chiller (which most breweries of that size do). You'll still have options though.